Tensile Strength of Untreated Napier Grass Fibre Reinforced Unsaturated Polyester Composites

2014 ◽  
Vol 554 ◽  
pp. 189-193 ◽  
Author(s):  
J.A. M. Haameem ◽  
M.S. Abdul Majid ◽  
E.A.H. Engku Ubaidillah ◽  
Mohd Afendi ◽  
R. Daud ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Composite Laminates ◽  
Unsaturated Polyester ◽  
Tensile Tests ◽  
Natural Fibre ◽  
Maximum Strength ◽  
Napier Grass ◽  
Fibre Composites ◽  
Polyester Composite ◽  
Polyester Composites

This paper describes the experimental investigation of the tensile strength of untreated Napier grass fibre reinforced polyester composites. Napier grass fibres were extracted trough conventional water retting process and used as reinforcing materials in the polyester composite laminates. Tensile tests were then conducted for the composite specimens from the laminates at 25% fibre loading using the electronic extensometer setup to obtain the tensile properties. The results show significant differences in tensile strength between random short fibres laminates and random long fibre laminates with the long fibres yield almost 45 % higher in the strength. The laminates also show higher maximum strength compared to other commonly available natural fibre composites with over 70 % increase in the maximum strength compared to the short kenaf fibre reinforced composites.

Tensile and Flexural Strength of Untreated Napier Grass Fibre/Polyester Composites

2015 ◽  
Vol 819 ◽  
pp. 295-300
Author(s):  
J.A.M. Haameem ◽  
M.S. Abdul Majid ◽  
M. Afendi ◽  
M. Haslan Fadli ◽  
E.A. Helmi ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Composite Laminates ◽  
Tensile Tests ◽  
Natural Fibre ◽  
Maximum Strength ◽  
Napier Grass ◽  
Fibre Composites ◽  
Short Fibres ◽  
Polyester Composite ◽  
Polyester Composites

This paper describes the experimental investigation of the tensile and flexural strength of untreated Napier grass fibre reinforced polyester composites. Napier grass fibres were extracted trough conventional water retting process and used as reinforcing materials in the polyester composite laminates. Tensile tests were then conducted for the composite specimens from the laminates at 25% fibre loading using the electronic extensometer setup to obtain the tensile properties. The results show significant differences in tensile strength between random short fibres laminates and random long fibrelaminates with the long fibres yield over 30 % higher in strength.Both the short and long fibre composites exhibits similar strength with short fibres having slightly higher flexural strength to long fibres The laminate also shows higher maximum strength compared to other commonly available natural fibre composites with almost 75 % improved in the maximum strength compared to the short kenaf fibre reinforced composites.

Tensile Properties of Pineapple Leaf Fibre Reinforced Unsaturated Polyester Composites

2014 ◽  
Vol 695 ◽  
pp. 159-162 ◽  
Author(s):  
Januar Parlaungan Siregar ◽  
Tezara Cionita ◽  
Dandi Bachtiar ◽  
Mohd Ruzaimi Mat Rejab
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Fiber Length ◽  
Interfacial Adhesion ◽  
Unsaturated Polyester ◽  
Fibre Length ◽  
Tensile Modulus ◽  
Natural Fibre ◽  
Fibre Content ◽  
Polyester Composites

In recent years natural fibres such as sisal, jute, kenaf, pineapple leaf and banana fibres appear to be the outstanding materials which come as the viable and abundant substitute for the expensive and non-renewable synthethic fibre. This paper investigate the effect of fibre length and fibre content on the tensile properties of pineapple leaf fibre (PALF) reinforced unsaturated polyester (UP) composites. PALF as reinforcement agent will be employed with UP to form composite material specimens. The various of fiber length (<0.5, 0.5–1, and 1-2 mm) and fibre content (0, 5, 10 and 15 % by volume) in UP composite have been studied. The fabrication of PALF/UP composites used hand lay-up process, and the specimens for tensile test prepared follow the ASTM D3039. The result obtained from this study show that the 1-2 mm fibre length has higher tensile strength (42 MPa) and tensile modulus (1344 MPa) values compared to fibre length of <0.5 mm (30 MPa and 981 MPa) and 0.5-1 mm (35.40 MPa and 1020 MPa) respectively. Meanwhile, for the effect of various fibre content in study has shown that the increase of fibre content has decreased in tensile strength dan tensile modulus of composites. The increase of fibre content due to poor interfacial bonding and poor wetting of the fibre by unsaturated polyster. The treatment of natural fibre are suggested in order to improve the interfacial adhesion between natural fibre and the unsaturated polyester.

Fabrication and Characterization of Biocomposite Using Grewia Optiva Fibre (i.e. Bhimal) Reinforced Polyvinyl Alcohol (PVA)

2015 ◽  
Vol 1105 ◽  
pp. 51-55 ◽  
Author(s):  
K.M. Gupta ◽  
Kishor Kalauni
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Fibre ◽  
Fabrication Method ◽  
View Point ◽  
Engineering Material ◽  
Fibre Composites ◽  
Grewia Optiva ◽  
Fabrication And Characterization

Bhimal fibres are quite a newer kind of bio-degradable fibres. They have never been heard before in literatures from the view point of their utility as engineering material. These fibres have been utilized for investigation of their properties. Characterization of this fibre is essential to determine its properties for further use as reinforcing fibre in polymeric, bio-degradable and other kinds of matrix. With this objective, the fabrication method and other mechanical properties of Bhimal-reinforced-PVA biocomposite have been discussed. The stress-strain curves and load-deflection characteristics are obtained. The tensile, compressive, flexure and impact strengths have been calculated. The results are shown in tables and graphs. The results obtained are compared with other existing natural fibre biocomposites. From the observations, it has been concluded that the tensile strength of Bhimal-reinforced-PVA biocomposite is higher than other natural fibre composites. Hence these can be used as reinforcement to produce much lighter weight biocomposites.

The Effect of Yarn Linear Density on Mechanical Properties of Plain Woven Kenaf Reinforced Unsaturated Polyester Composite

2013 ◽  
Vol 465-466 ◽  
pp. 962-966 ◽  
Author(s):  
Mohd Pahmi bin Saiman ◽  
Mohd Saidin Bin Wahab ◽  
Mat Uzir Wahit
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Linear Density ◽  
Unsaturated Polyester ◽  
Composite Panel ◽  
Composite Yarn ◽  
Polyester Composite ◽  
The Impact ◽  
Woven Kenaf

To produce a good quality of dry fabric for reinforced material in a natural-based polymer composite, yarn linear density should be in consideration. A woven kenaf dry fabric with three different linear densities of 276tex, 413.4tex and 759tex were produced. The fabrics with different linear densities were been optimize with the assistance of WiseTex software. The optimized dry fabrics were infused with unsaturated polyester to produce composite panel using vacuum infusion process. The composites properties were tested on the tensile strength, flexural strength and the impact strength. The result shows that the mechanical properties of the composite increased when the yarn linear densities increased.

Tensile Property of the Flax/Polyester Composites after Water Treatment

2011 ◽  
Vol 194-196 ◽  
pp. 1740-1744 ◽  
Author(s):  
Qiu Hong Wang ◽  
Gu Huang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Water Treatment ◽  
Tensile Property ◽  
Unsaturated Polyester ◽  
Water Immersion ◽  
The Matrix ◽  
Polyester Composites ◽  
Scanning Electron

Flax fabric was woven and composites were produced by using the VARI technique with flax fabric as the reinforcement and unsaturated polyester as the matrix. Laminates with two, three and four layers were fabricated respectively. After saturated in the water for different durations of time (7, 14, 21 and 30 days), the tensile strength of the composites was tested. After being soaked in the water for 7, 14 and 21 days, the tensile strength of the two-layer composites was decreased. For the three and four layers specimens, the tensile strength was increased initially with water treatment for 7 and 14 days,and decreased for 21 and 30 days. Scanning electron microscopy (SEM) confirmed that it might be contributed to the thickness of the two-layer composites. The thinner specimen is easier to be damaged by the penetrated moisture owing to the delamination between the fiber and the matrix after water immersion. For the three and four layers specimens, their contradictory tensile strength suggests that the thicker specimen can delay the moisture permeation and is of better water durability.

Effect of Water Absorption Behaviour on Tensile Properties of Hybrid Jute-Roselle Woven Fibre Reinforced Polyester Composites

2021 ◽  
Vol 18 (4) ◽  
Author(s):  
Agung Efriyo Hadi ◽  
Tezara Cionita ◽  
Deni Fajar Fitriyana ◽  
Januar Parlaungan Siregar ◽  
Ahmed Nurye Oumer ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Fibre Composite ◽  
Unsaturated Polyester ◽  
Water Immersion ◽  
Tensile Modulus ◽  
Natural Fibre ◽  
Jute Fibre ◽  
Thickness Swelling ◽  
Effect Of Water

Incorporating natural fibre as reinforcement in the polymer matrix has shown a negative effect since the natural fibre is hydrophilic. The natural fibre easily absorbs water which causes an effect on the mechanical properties of the composites. The objective of this paper is to investigate the water absorption behaviour of hybrid jute-roselle woven fibre reinforced unsaturated polyester composite and the effect of water absorption in terms of tensile strength and tensile modulus. The effect of hybrid composite on the thickness swelling will be tested. The fabrication method used in this study is the hand lay-up technique to fabricate 2-layer and 3-layer composites with layering sequences of woven jute (J)/roselle (Ro) fibre. The results of the study showed that pure roselle fibres for 2 and 3-layer composites have the highest water absorption behaviour 3.86% and 5.51%, respectively, in 28 days) as well as thickness swelling effect, whereas hybrid J-Ro and J-J-Ro composites showed the least water absorption (2.65% and 3.76%, respectively) in 28 days) in both the tests. The hybridisation between jute and roselle fibres reduced water absorption behaviour and improved the fibres dimensional stability. The entire composites showed a decreasing trend for both tensile strength and tensile modulus strength after five weeks of water immersion. Jute fibre composite hybridised with roselle fibre can be used to reduce the total reduction of both tensile strength and tensile modulus throughout the whole immersion period. Moreover, the tensile testing showed that jute fibre composite hybridised with roselle fibre have produced the strongest composite with the highest tensile and modulus strength compared to other types of composites. The hybridisation of diverse fibre reinforcements aids in minimising the composite water absorption and thickness swelling, hence reducing the effect of tensile characteristics.

Effects on Tensile and Morphology Properties of Casuarina equisetifolia Reinforced Unsaturated Polyester Composites

2013 ◽  
Vol 748 ◽  
pp. 211-215
Author(s):  
Borhan Nurulaini ◽  
Romli A.Z. ◽  
Mohd Hanafiah Abidin
Keyword(s):  
Tensile Strength ◽  
Tensile Test ◽  
Natural Fiber ◽  
Unsaturated Polyester ◽  
Casuarina Equisetifolia ◽  
Microscopy Technique ◽  
Morphological Studies ◽  
Structural Applications ◽  
Polyester Composites ◽  
Composite Samples

New knowledge in findings potential usage of natural fiber as new material in composite technology has been increased gradually in years and these natural fiber materials are well known as competent material which can become an alternative material to the conventional and synthetic materials for suitable applications. In this research, Casuarina equisetifolia leaf was used as bio-based fiber and unsaturated polyester composite as the matrix due to its natural surface roughness without any chemical treatment. The aim of this study was to investigate the effect of various weight loadings of Casuarina equisetifolia in unsaturated polyester composites on the tensile test and morphological studies. The composite samples were fabricated by using press machine with mould dimension of (15x15x0.3) cm. From the tensile test results, tensile strength of the composite samples decreases with the increment of Casuarina equisetifolia by weight loadings. The surface morphology of the fractures composite samples was then analyzed using the microscopy technique (SEM) and found the evidence of fractured fiber breakage and voids content of the samples. Base on the result obtained, the tensile strength at 30% up to 50% weight loading of Casuarina equisetifolia has the potential to be used in non-structural applications.

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